Service Limit

Make a measurement as follows. If it exceeds the specified service limit, replace the parts with new ones.

CAUTION:

Fix oil pump on a vise to make a measurement. At this time, hold oil pump with the least possible force between two wood pieces.
Do not set outside of flow control valve or pulley on a vise; otherwise outside or pulley might be deformed. Select properly sized wood pieces.

Play of pulley shaft
1. On condition: P: 9.8 N (1.0 kgf, 2.2 lb)
2. Service limit:
  1. Radial play (Direction <-->)
    1. 0.4 mm (0.016 in) or less
  Fig 1: Checking Play Of Pulley Shaft Using Dial Indicator (Radial Play)
  Courtesy of SUBARU OF AMERICA, INC.
1. Axial play (Direction <-->)
  1. 0.6 mm (0.024 in) or less
  Fig 2: Checking Play Of Pulley Shaft Using Dial Indicator (Axial Play)
  Courtesy of SUBARU OF AMERICA, INC.
Ditch deflection of pulley
1. Service limit: 1.0 mm (0.039 in) or less
NOTE: Read the value for one surface of V ditch, and then the value for another off the dial.

Fig 3: Ditching Deflection Of Pulley Using Dial Indicator
Courtesy of SUBARU OF AMERICA, INC.
Resistance to rotation of pulley
1. Service limit: Maximum load; 9.22 N (0.94 kgf, 2.07 lb) or less
NOTE:
- A rather higher value may be indicated when pulley starts turning.
- Measure the load during rotation and make a judgment.
Fig 4: Pulling Pulley Load
Courtesy of SUBARU OF AMERICA, INC.